urllib3 is vulnerable to denial of service. The _encode_invalid_chars
function in util/url.py
allows an attacker to cause a denial of service condition through long processing time due to an inefficient algorithm when parsing invalid characters, potentially resulting in an application crash when system resources are depleted.
github.com/urllib3/urllib3/blob/master/CHANGES.rst
github.com/urllib3/urllib3/commit/a74c9cfbaed9f811e7563cfc3dce894928e0221a
github.com/urllib3/urllib3/commit/a74c9cfbaed9f811e7563cfc3dce894928e0221a#diff-c289049c6f3c9d7397378a8be7e700c6R143
github.com/urllib3/urllib3/pull/1586
pypi.org/project/urllib3/1.25.8/